硬件抽象层共分为内部通信模块、虚拟驱动模块和设备管理模块三部分。

Hardware Abstraction Layer has three models of internal communication, virtual driver and equipment management.

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负责接听控制台电话，管理客房部内部以及对外通信，并对客房部提供文书服务。

Responsible for attending to the control desk telephone, communication within Housekeeping and between Housekeeping and other departments as well as clerical services of the Housekeeping department.

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